JP2003048138A - Cutting tool holder with protective cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting tool holder with a protective cover in which, when a cutting tool is set to a work, a tip of a cylindrical body touches the work, a cutting part is covered, and by rotating the cutting tool in this condition, the cylindrical body is pressed by the work while synchronized to the advancement of the cutting tool, and retracted into the holder, the cutting part during the cutting can thus be housed, the cutting part can be housed by the cylindrical body, scattering of chips can be prevented, and the chips can be accommodated. SOLUTION: The cutting tool holder comprises the cutting tool, the cylindrical body housing the cutting part to a handle part movably in the axial direction, an elastic member for urging the cylindrical body to the cutting part side, an elastic member stopper, a cylindrical stopper for limiting the movement in the axial direction for preventing the tip of the cylindrical body from protruding from the cutting part, and the holder housing over a base part of the cylindrical body and housing over the handle part rotatably and immovably in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting tool holder with a protective cover used when machining a work.

[0002]

2. Description of the Related Art A tap is an example of a cutting tool used for machining a workpiece. The tap forms a female thread, and the tap holder used for such taps has
For example, there is one disclosed in Japanese Utility Model Laid-Open No. 5-78428 “Tap Holder”, but as an example, an example of a tap holder used for a tap will be briefly described in the following figure.

FIGS. 8 (a) and 8 (b) are side views of a conventional tap and explanatory views of a screw processing procedure. In (a), the tap 101 includes a handle portion 102, a tap portion 103, and a shank portion 104. To process the screw, first attach the handle 102 to the holder 105, and then attach the holder 105 manually.
Then, the tap portion 103 is set on the screw 108 for forming on the work 107 as shown by an arrow a. Next, tap 101 with the electric tool 109 attached to the shank 104.
To rotate.

In (b), the tap portion 103 is passed through the female screw 108 (see (a)) as shown by an arrow b, so that the female screw 108 is finished and a screw 111 is obtained for completion. As described above, according to the conventional technique of FIG.
By providing 05, it becomes easy to hold the rotating handle 102.

[0005]

However, in the case of the prior art shown in FIG. 8, the tap portion 103 which is rotating during the threading process is used.
Wrap cloth or thread around. Further, in the conventional technique shown in FIG. 8, when the tap 101 is erected and screwed upward, the tap portion 1
Chips and oil fall from 03 and stain hands and clothes, resulting in a bad working environment.

Therefore, an object of the present invention is to provide a cutting tool holder with a protective cover for covering the cutting portion of a cutting tool being machined and for storing the chips while preventing the chips from scattering.

[0007]

In order to achieve the above object, the first aspect of the present invention is to provide a cutting tool having a cutting portion at one end of the handle and a shank portion at the other end, and an axial movement from the cutting portion to the handle. A coverable cylinder, an elastic member that urges the cylinder toward the cutting portion, an elastic member stopper that locks the elastic member, and an axial direction so that the tip of the cylinder does not protrude from the cutting portion. It consists of a cylindrical stopper that restricts movement, and a holder that covers the base of such a cylindrical body and rotatably and axially immovably covers the handle. It is characterized in that the cylindrical body can be moved back and forth in the axial direction as a cutting portion protection cover during the machining operation.

A cutting tool holder with a protective cover is provided with a tubular body that is axially movable from the cutting portion to the handle portion, an elastic member that urges the tubular body toward the cutting portion, and a base portion of the tubular body that covers the tubular member. Since the holder has a rotatably and axially immovable cover, the tip of the tubular body contacts the workpiece and the tubular body covers the cutting portion when the cutting portion is set in the hole of the workpiece. After the setting, when the cutting tool is rotated, the cylindrical body is pushed by the work and moves backward in the axial direction against the elastic member in synchronization with the forward movement of the cutting tool in association with the machining operation of the cutting tool. Therefore, the cylindrical body continues to cover the rotating cutting portion during processing.

Further, the cutting tool holder with a protective cover is
A tubular body that is axially movable from the cutting portion to the handle, an elastic member that biases the tubular body toward the cutting portion, and a base that covers the tubular body and is rotatable and axially immovable on the handle. Since it has a covered holder, the cylindrical body stores chips while preventing the chips from scattering.

According to a second aspect of the present invention, the cylindrical body is provided with a stationary member on its outer periphery, and holds the rotating cutting tool in a stationary state. The rotation of the cylindrical body can be stopped by bringing the stationary member on the outer periphery into contact with the slit of the holder.
As a result, the cylindrical body holds the rotating cutting tool in a stationary state, so that even if the cutting section rotates, the workpiece surface is not scratched. That is, exposure of the cut portion during processing is completely prevented.

According to a third aspect of the present invention, the tip of the cylinder has a diameter larger than the diameter of the cylinder itself. By making the tip of the tube larger than the diameter of the tube itself, the area of the tip is increased and the scattering of chips is further improved.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals. FIG. 1 is a side view of a cutting tool holder with a protective cover according to the present invention. A cutting tool holder 11 with a protective cover mainly includes a tap 12 as a cutting tool, a cylinder 13 holding the tap 12, and a holder 14. The configuration. Reference numeral 15 is a socket attached to the tap 12.

FIG. 2 is a cross-sectional view of a cutting tool holder with a protective cover according to the present invention. The above-mentioned tap 12, the cylindrical body 13 covering the tap 12, the holder 14 for holding the tap 12, and the socket 15 are shown. Indicates. The tap 12 is a long tap having a tap portion 23 as a cutting portion at one end 22 of the handle portion 21 and a shank portion 25 at the other end 24.

The tubular body 13 is a main body member 2 as the tubular body itself.
6, a tip 27 is provided at one end, a base 31 is provided at the other end, a ring member 32 is integrally fitted at the other end, and a stationary member 2 is provided at the outer periphery.
The ring member 32 is a cutting part protection cover provided with 6a.
The rotating handle portion 21 is held on the inner surface of and the tap portion 23 is covered by the tip end 27 side. The material of the cylindrical body 13 was metal. The diameter of the cylindrical body 13 was set to D.

The holder 14 is a grip portion in which a ring member 34 is integrally fitted to the end of the main body member 33 and a slit 33a is formed at the end, and holds the handle 21 that rotates on the inner surface of the ring member 34. The material of the holder 14 is metal.

That is, the cutting tool holder 11 with a protective cover shown in FIG. 2 has a tap 12, a tubular body 13 which is axially movable from a tap portion 23 of the tap 12 to a handle portion 21, and the tubular body 13. The elastic member 41 that urges the elastic member 41 toward the tap portion 23, the elastic member stopper 42 that locks the elastic member 41, and the tip end 27 of the tubular body 13 is fixed by the tap portion 23.
From the cylindrical stopper 43 that restricts the axial movement so as not to project further, and the holder 14 that covers the base 31 of the cylindrical body 13 and rotatably and immovably in the axial direction the handle 21. Become. 42a and 43a are set screws.

Although the cylinder 13 and the holder 14 are made of metal, they may be made of resin. In particular, by using a transparent resin for the cylindrical body 13, it becomes easier to visually confirm the tip position of the tap 12.

The elastic member 41 is, for example, a compression coil spring. When the cylindrical stopper 43 is attached, the distance from the tip of the tap portion 23 to the tip 27 of the cylindrical body 13 is set to Lt, but the distance Lt may not be provided depending on the processing conditions.

FIG. 3 is a view taken in the direction of arrow 3 in FIG. Socket 1
In No. 5, a square hole 44 is formed on the inside, and a hexagonal power connecting portion 45 is formed on the outside. Power connection 45
A female screw 46 is formed on the socket 15 and the set screw 47 is screwed into the female screw 46 to stop the socket 15.

FIG. 4 is an exploded view of a cutting tool holder with a protective cover according to the present invention. The handle portion 21 of the tap 12 has a first mounting hole 51 formed on the tap portion 23 side and a second mounting hole 52 formed on the shank portion 25 side. In addition,
For example, an electric discharge machine is used to form the first and second mounting holes 51 and 52. The cylindrical stopper 43 is formed with a female screw 53 for screwing the set screw 43a. The elastic member stopper 42 is formed with a female screw 54 for screwing the set screw 42a.

Next, the procedure for assembling the cutting tool holder 11 with the protective cover will be briefly described. First, the cylindrical stopper 43 is fitted into the handle 21, and the set screw 43a is screwed in. Next, the handle 21 is covered with the tubular body 13 (with the ring member 32) from the shank portion 25 side. Subsequently, the elastic member 41 and the elastic member stopper 42 are fitted, and the set screw 42a is screwed in. Then, the slit 33a is fitted to the stationary member 26a while covering the holder 14 (with the ring member 34) from the shank portion 25 side. Finally, the socket 15 is fitted into the shank portion 25 and fixed with the set screw 47, and the cutting tool holder 11 with the protective cover is completed.

The operation of the cutting tool holder with the protective cover described above will be described below. 5 (a) and 5 (b) are first operation diagrams of the cutting tool holder with the protective cover according to the present invention. Here, the cutting tool holder 11 with a protective cover is lifted almost vertically, and a female screw is formed upward by the upward operation.

In (a), the cutting tool holder 11 with a protective cover is set on the work W. Specifically, the holder (grip portion) 14 is held by the hand 61, the electric tool 62 is attached to the socket 15, and the cutting tool holder 11 with the protective cover is attached to the female screw 63 which is pre-opened on the work W and is indicated by an arrow. Like this. Cutting tool holder with protective cover 11
Since the distance Lt is provided so that the tip end 27 of the tubular body 13 does not protrude from the tap portion 23, the tap portion 23 can be easily positioned with respect to the female screw 63.

In (b), after setting the cutting tool holder 11 with the protective cover, the tap 12 is rotated by the electric tool 62 to start the finishing process of the screw. As shown in the figure, since the tubular body 13 is covered from the tap portion 23 to the handle portion, when the tap portion 23 is fitted to the female screw 63, the tubular body 13 comes into contact with the work W as shown by an arrow, and the tap portion 23 is attached. Can be covered.

FIG. 6 is a second operation diagram of the cutting tool holder with a protective cover according to the present invention. Tap with power tool 62
The female screw 63 is finished by rotating 2 as indicated by the arrow. Here, when the tap 12 is rotated, the tap portion 23 advances (in the direction of the arrow), but at that time, the tubular body 1
Since 3 is pushed by the work W as shown by the arrow and moves backward, the tap portion 23 can continue to move forward, and the screw 64 can be formed for completion.

That is, in the cutting tool holder 11 with the protective cover, the tubular body 13 is covered from the tap portion 23 to the handle portion 21 so as to be movable in the axial direction, and the tubular body 13 is provided with the tap portion 23.
Since the elastic member 41 that urges the side and the holder 14 that covers the base portion 31 of the tubular body 13 and rotatably and axially immovably covers the handle portion 21, the tap portion 23 is set on the work W. Then, the tip 27 of the cylindrical body 13 contacts the work W, the tap portion 23 is hidden in the cylindrical body 13, and when the tap 12 is continuously rotated, the cylindrical body 13 is pushed by the work W and the tap 12 moves forward. The elastic member 41 is synchronized with
It moves backward in the axial direction (the direction of the arrow) against. Therefore, the tubular body (cutting portion protection cover) 13 can cover the rotating tap portion 23 during screw processing.

Further, the cutting tool holder 11 with a protective cover
Is the cylindrical body 13 covered from the tap portion 23 to the handle portion 21.
Since it has, the cylindrical body 13 can receive the chips formed by the tap portion 23. Therefore, it is possible to store the chips while preventing the chips from scattering.

Further, the cylindrical body 13 has a stationary member 26 on its outer periphery.
Since the stationary member 26a comes into contact with the slit 33a, the rotation of the cylindrical body 13 can be stopped. As a result, the cylindrical body 13 rotates the tap 1
Since 2 is held in a stationary state, even if the tap 12 rotates, the work surface is not scratched. That is, it is possible to completely prevent the cut portion from being exposed during screw processing.

The cutting tool holder 11 with a protective cover
Can exhibit the same effect when the tap 12 is pulled out. That is, the tap portion 2 that rotates on the cylindrical body 13
3 can be covered, the chips can be stored while preventing the chips from scattering, and further, the generation of scratches can be prevented.

Next, another embodiment of the cutting tool holder with a protective cover according to the present invention will be shown. FIG. 7 is a diagram of another embodiment, and the same components as those of the embodiment shown in FIG. 2 are designated by the same reference numerals and the description thereof will be omitted. The cutting tool holder 11B with a protective cover is characterized in that the tip 71 of the cylindrical body 13B has a larger diameter than the diameter D of the main body member 26 as the cylindrical body itself.

The cylindrical body 13B has a cover member 72 attached to the end of the main body member 26. Reference numeral 73 indicates a ring-shaped clip. The diameter of the tip of the cover member 72 is set to D1 (D1
> D). The material of the cover member 72 is, for example,
It is a resin and has transparency.

In a cutting tool holder 11B with a protective cover according to another embodiment, the tip 71 of the cylindrical body 13B is attached to the body member 26.
Since the diameter D1 is larger than the diameter D, the area for receiving the chips becomes large, and the chips can be stored more reliably. Also, a cutting tool holder with a protective cover 1
In 1B, since the tip end 71 of the cylindrical body 13B has the diameter D1 larger than the diameter D of the main body member 26, the capacity for inserting the chips becomes large, and the working efficiency can be improved. Since the material of the cover member 72 is transparent, the tip position of the tap 12 can be visually observed through the transparent cover member 72.

The material of the cover member 72 shown in the embodiment of the present invention may be rubber or opaque. The cutting tool is not limited to the tap 12. Although the tap 12 in FIG. 2 has a long shape, the tap is not limited to the long shape. Although the female screw 63 before finishing is machined on the work W in FIG. 5, the presence or absence of the female screw before finishing is optional. Even when there is no female screw before finishing, the cutting tool holder 11 with the protective cover is similarly formed in the hole. Can be used. By using a magnetizable metal for the material of the cylindrical body 13 and magnetizing the cylindrical body 13, the chips can be retained in the cylindrical body 13 and collected without spilling.

[0034]

The present invention has the following effects due to the above configuration. In the first aspect, the cutting tool holder with a protective cover includes a cutting tool having a cutting portion at one end of the handle portion and a shank portion at the other end, and a tubular body that is axially movable from the cutting portion to the handle portion. An elastic member that urges the tubular body toward the cutting portion, an elastic member stopper that locks the elastic member, and a tubular body stopper that restricts axial movement so that the tip of the tubular body does not protrude from the cutting portion. , And a holder that covers the base of such a cylinder and rotatably and immovably in the axial direction on the handle, so that when the cutting part is set on the work, the tip of the cylinder contacts the work, The tubular body can cover the cutting portion. Continuously, when the cutting tool is rotated, along with the machining operation of the cutting tool, in synchronization with the advance of the cutting tool,
The cylindrical body is pushed by the work and moves backward in the holder in the axial direction against the elastic member. Therefore, it is possible to cover the rotating cutting portion being machined with the tubular body.

Further, a tubular body which is axially movable from the cutting portion to the handle portion, an elastic member which urges the tubular body toward the cutting portion side, and a tubular portion which covers the base portion of the tubular body and is rotatable around the handle portion. In addition, since the holder has the holder that is immovable in the axial direction, the cylindrical body can receive the chips formed by the cutting portion. Therefore, it is possible to store the chips while preventing the chips from scattering.

According to the second aspect of the present invention, the cylindrical body is provided with the stationary member on the outer periphery, and the rotation of the cylindrical body can be stopped by the stationary member contacting the slit of the holder. as a result,
Since the cylindrical body holds the rotating cutting tool in a stationary state, even if the cutting tool rotates, it is possible to completely prevent exposure of the cutting portion during machining without scratching the work surface.

In the third aspect, since the tip of the tubular body has a diameter larger than the diameter of the tubular body itself, the area of the tip for receiving the chips is large, and the chips can be stored more reliably.

[Brief description of drawings]

FIG. 1 is a side view of a cutting tool holder with a protective cover according to the present invention.

FIG. 2 is a sectional view of a cutting tool holder with a protective cover according to the present invention.

FIG. 3 is a view taken in the direction of arrow 3 in FIG.

FIG. 4 is an exploded view of a cutting tool holder with a protective cover according to the present invention.

FIG. 5 is a first action diagram of the cutting tool holder with a protective cover according to the present invention.

FIG. 6 is a second operation diagram of the cutting tool holder with a protective cover according to the present invention.

FIG. 7 is a diagram of another embodiment.

FIG. 8 is a side view of a conventional tap and an explanatory view of a screw processing procedure.

[Explanation of symbols]

11, 11B ... Cutting tool holder with protective cover, 12 ...
Cutting tool (tap), 13 ... Cylindrical body, 14 ... Holder, 21
... handle part, 22 ... one end of handle part, 23 ... cutting part (tap part), 24 ... other end of handle part, 25 ... shank part, 27 ... tip of cylinder, 31 ... base of cylinder, 41 ... elasticity Member, 42 ...
Elastic member stopper, 43 ... Cylindrical stopper.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Minoru Ueda             One of 1-10 Shin-Sayama, Sayama City, Saitama Prefecture             Inside the Saitama Factory of TAGIKEN Co., Ltd. (72) Inventor Naoto Aoki             One of 1-10 Shin-Sayama, Sayama City, Saitama Prefecture             Inside the Saitama Factory of TAGIKEN Co., Ltd. (72) Inventor Masashi Matsuzawa             One of 1-10 Shin-Sayama, Sayama City, Saitama Prefecture             Inside the Saitama Factory of TAGIKEN Co., Ltd. (72) Inventor Takeshi Otomo             One of 1-10 Shin-Sayama, Sayama City, Saitama Prefecture             Inside the Saitama Factory of TAGIKEN Co., Ltd. F term (reference) 3C036 HH08

Claims (3)

[Claims] 1. A cutting tool having a cutting portion at one end of a handle and a shank portion at the other end, a tubular body covering the cutting portion so as to be movable in the axial direction, and the tubular body facing the cutting portion. An elastic member that urges the elastic member, an elastic member stopper that locks the elastic member, a cylindrical body stopper that restricts the axial movement so that the tip of the cylindrical body does not protrude from the cutting portion, and such a cylindrical body A holder that covers the base part and rotatably and immovably in the axial direction on the handle part, and uses the holder as a grip part, and protects the tubular body during the machining operation of the cutting tool. A cutting tool holder with a protective cover that can be moved backward in the axial direction. 2. The cutting tool holder with a protective cover according to claim 1, wherein the cylindrical body is provided with a stationary member on an outer periphery thereof, and holds the rotating cutting tool in a stationary state. 3. The cutting tool holder with a protective cover according to claim 1, wherein the tip of the cylinder has a diameter larger than the diameter of the cylinder itself.